Channel emulating device
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first embodiment
[0018] As shown in FIG. 3, a channel emulating device according to the present invention emulates such as 4×4 wireless transmission systems.
[0019] In this embodiment, the channel emulating device 5 is disposed between a testing device TD and a device-under-test DUT. The testing device TD has a wireless access point (AP)(not shown). The testing device TD generates a first input signal S1 and three second input signals S2, S3 and S4 and transmits the signals S1 to S4 to the channel emulating device 5. The device-under-test DUT has an Ethernet adapter and a computer (not shown). The device-under-test DUT receives a first output signal X1 and three second output signals X2, X3 and X4. The channel emulating device 5 includes a first choosing module 51, a first signal integrating module 52, a first parameter adjusting module 53, a second parameter adjusting module 54, a second choosing module 55, a second signal integrating module 56 and a third choosing module 57.
[0020] The first choosi...
second embodiment
[0037] As shown in FIG. 4, a channel emulating device according to the present invention emulates such as 2×2 wireless transmission systems.
[0038] In this embodiment, the channel emulating device 6 is disposed between a testing device TD and a device-under-test DUT. The testing device TD generates a first input signal S1 and a second input signal S2 and transmits the signals S1 and S2 to the channel emulating device 6. The device-under-test DUT receives a first output signal X1 and a second output signal X2. The channel emulating device 6 includes a first choosing module 61, a first signal integrating module 62, a first parameter adjusting module 63, a second parameter adjusting module 64, a second choosing module 65, a second signal integrating module 66, a third choosing module 67 and a control module 68. The connections, properties and functions of the above-mentioned modules are the same as those of the first embodiment, and detailed descriptions thereof will be omitted. In this...
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